Microphone filter



FIG. 1 is a perspective view of a microphone filter showing my new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a right side elevational view;

FIG. 4 is a top view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view; and,

FIG. 7 is a bottom view thereof.

The broken line showing of a side firing microphone on FIG. 1 is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for a microphone filter, as shown and described. 